Abstract

A solar-pumped 100W class laser that features high efficiency and low cost owing to the use of a Fresnel lens and a chromium codoped neodymium YAG ceramic laser medium was developed. A laser output of about 80W was achieved with combination of a 4m2 Fresnel lens and a pumping cavity as a secondary power concentrator. This output corresponds to 4.3% of conversion efficiency from solar power into laser, and the maximum output from a unit area of Fresnel lens was 20W∕m2, which is 2.8 times larger than previous results with mirror-type concentrator.

References

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